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Filter Media-MCEF. Filter Media-MCEF. MCEF Uses In line collection point for asbestos or metals Purpose Collection of select contaminants Serves as “capture” point of sampling train for later analysis. Filter Media-MCEF. Asbestos sampling Collects fibers from sampled air Metals sampling

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Filter media mcef1
Filter Media-MCEF

  • MCEF Uses

    • In line collection point for asbestos or metals

  • Purpose

    • Collection of select contaminants

    • Serves as “capture” point of sampling train for later analysis


Filter media mcef2
Filter Media-MCEF

  • Asbestos sampling

    • Collects fibers from sampled air

  • Metals sampling

    • Collects only metal particulate

      • On filter surface and within filter itself


Filter media mcef3
Filter Media-MCEF

  • Operating parameters

    • Requires high-flow pump

    • 37mm cassette filter holder

      • Asbestos (.5-16L/min)

        • 25mm .8um filter pad, 3 stage extended cowl cassette

      • Metals(1-3L/min)

        • 37mm .8um filter pad, 3 stage cassette


Filter media mcef4
Filter Media-MCEF

  • Method of analysis

    • Asbestos

      • Filter pad is sectioned, and placed on PCM slide

      • Filter is then digested with acetone vapor leaving only collected fibers

      • Fibers are then counted with Walton-Beckett graticule

      • Particle with 3:1 or greater length:width ratio is counted

      • Presented results are in fibers per cc of air


Filter media mcef5
Filter Media-MCEF

  • Method of analysis

    • Metals

      • Important toxicologically to know both qualitative and quantitave properties of different metals present

      • Filter pad is dissolved or ashed

      • Remaining solution is analyzed by

        • Atomic absorption spectroscopy(AAA)

        • Inductively couple plasma emission spectroscopy(ICP)


Filter media mcef6
Filter Media-MCEF

  • Calibration is performed with representative MCEF sampling media in line

    • Rotameter

      • Flow is calibrated against ball “floating” in air in the chamber

    • Bubble tube(Manual or Electronic)

      • Flow is calibrated by timing bubble travel speed in vertical column


Filter media mcef7
Filter Media-MCEF

  • Filter Cassettes for asbestos

  • Filter Cassette for metals


References cited
References Cited

SKC Inc. Corporate Web Page

http://www.skcinc.com/ accessed 04/03/01


Bibliography
Bibliography

  • DiNardi Salvatore R. (1998) The Occupational Environment-Its Evaluation and Control, AIHA, Fairfax, Virginia

  • Goetsch David L. (1999) Occupational Safety and Health for Technologists, Engineers, and Managers, Prentice Hall, Upper Saddle River, New Jersey


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